After checking online stores and my local pet stores I have a heater for my 2.5 gallon tank. It keeps the temp approx 80F. Blue Pearl is happier and has his fins all out. He also is not staying on the bottom of the tank either. He is very happy. I also added 3 more live plants to his tank, which is breaking up the water force from the filter so he is not getting tired of fighting it. He is so much more happy. He did eat the two rams-horn snails that came with the first plant. They made a good meal for him. Too bad for the snails as I now have algae growing on the gravel and on his big rock. But at least he is happy now.